Changing The Audio Input Format; Interfacing The Tas5101Se Evm; Description Of Control Signals; Shutdown - Texas Instruments TAS5101SE User Manual

Changing the Audio Input Format

4.1 Changing the Audio Input Format
The bottom of the board contains a grouping of R0603 resistor pads that
determine the audio input format. The TAS5101SE EVM is shipped configured
for I
in Table 4–1.
Table 4–1. Audio Input Jumper Options
Mode MOD2
R3A = open/R3B = 0 Ω
0
R3A = open/R3B = 0 Ω
1
R3A = open/R3B = 0 Ω
2
R3A = open/R3B = 0 Ω
3
4 R3A = 10 kΩ/R3B = open
5 R3A = 10 kΩ/R3B = open
6 R3A = 10 kΩ/R3B = open
7 R3A = 10 kΩ/R3B = open

4.2 Interfacing the TAS5101SE EVM

As discussed in previous sections, a source of digital audio connected to J1
is required to get an audio output from the TAS5101SE EVM.

4.3 Description of Control Signals

4.3.1

SHUTDOWN

A logic low on J1 pin 8 signals that the TAS5101 has been shut down by an
error condition, such as a short circuit, overtemperature, or a low-voltage
condition. A reset signal must be sent to J1 pin 10 to clear this condition.
SHUTDOWN is generally used, along with RESET_5K, in conjunction with the
system controller (microcontroller) to implement a closed-loop control system
for error reset. The system controller provides a delay of approximately 4 mS
between error and resetting. Lastly, the system controller can be used to turn
off the amplifier if error conditions persist.
4.3.2

RESET_5K

A logic low on J1 pin 10 resets the TAS5010 modulator, which in turn resets
the TAS5101. This signal is used to initialize the TAS5010 for operation and
to reset error conditions, when they occur, on the TAS5101.
4.3.3

POWERDOWN (Active Low)

A logic low on J1 pin 14 places the TAS5010 modulator in the low-power
(power-down) mode.
4-2
2
S format. To change the format, move/replace the resistors as described
MOD1 MOD0
R2A = open/R2B = 0 Ω R1A = open/R1B = 0 Ω
R2A = open/R2B = 0 Ω
R1A = 10 kΩ/R1B = open
R1A = open/R1B = 0 Ω
R2A = 10 kΩ/R2B = open
R2A = 10 kΩ/R2B = open R1A = 10 kΩ/R1B = open
R2A = open/R2B = 0 Ω R1A = open/R1B = 0 Ω
R2A = open/R2B = 0 Ω
R1A = 10 kΩ/R1B = open
R1A = open/R1B = 0 Ω
R2A = 10 kΩ/R2B = open
R2A = 10 kΩ/R2B = open R1A = 10 kΩ/R1B = open
Format
16-bit; MSB first; right
justified
20-bit, MSB first; right
justified
24-bit; MSB first; right
justified
16-bit; I 2 S
20-bit; I 2 S
24-bit I 2 S
16-bit; MSB first; left justified
16-bit; DSP frame